> CVE-2026-8840 [MEDIUM]

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PUBLISHED
2026-08-15 03:16
MODIFIED
2026-08-15 03:16
CVSS_SCORE V3
5.3
EPSS (Prob. Exploit)
0.55%
Top 54.2%
DATA SOURCES:
NVD 🔗 2026-08-15 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01

> DESCRIPTION

The Booking calendar, Appointment Booking System plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.2.36. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to mark arbitrary reservations as paid or completed, cancel legitimate payments, auto-approve reservations, and trigger transactional booking emails by writing attacker-supplied payment status and transaction data directly into the payments table. The auto-approval of reservations is only triggered when the 'enable_psuccess_approval' site option is enabled, but payment status manipulation and email dispatch are exploitable regardless of that setting.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EXPLOITABILITY
3.9
IMPACT
1.4

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-862

> CWE DETAILED DESCRIPTIONS

CWE-862: Missing Authorization - The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

> HISTORIQUE DES MODIFICATIONS

Première apparition
15/08/2026 03:16
Source: NVD
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-862: Missing Authorization - The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Total des modifications: 1 Dernière mise à jour: 2 months ago

> REFERENCES

https://plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.35/admin/co...
https://plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.35/admin/co...
https://plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.35/booking_...
https://plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.35/booking_...
https://plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.36/admin/co...
https://plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.36/admin/co...
https://plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.36/booking_...
https://plugins.trac.wordpress.org/browser/booking-calendar/tags/3.2.36/booking_...
https://www.wordfence.com/threat-intel/vulnerabilities/id/88409bb0-5cb0-4f63-b8f...
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